Safe Drinking Water Information System (SDWIS) Federal Reporting Services

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PWS ID	OR4100954
PWS Name	WILSONVILLE, CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	25915
County Served	Clackamas

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	903157747	Returned to Compliance	01-JUL-2025	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	903157742	Returned to Compliance	01-MAY-2018	31-MAY-2018	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	903157743	Returned to Compliance	01-MAY-2018	31-MAY-2018	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	903157745	Returned to Compliance	01-MAY-2018	31-MAY-2018	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	903157744	Returned to Compliance	01-MAY-2018	31-MAY-2018	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	903157740	Returned to Compliance	01-MAR-2017	31-MAR-2017	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	903157733	Returned to Compliance	01-APR-2016	30-JUN-2016	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	903157732	Returned to Compliance	01-APR-2016	30-JUN-2016	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	903157720	Returned to Compliance	23-DEC-2013	-	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	903157719	Returned to Compliance	01-OCT-2013	31-OCT-2013	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	903157716	Returned to Compliance	01-SEP-2013	30-SEP-2013	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	903157718	Returned to Compliance	01-SEP-2013	30-SEP-2013	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	903157717	Returned to Compliance	01-SEP-2013	30-SEP-2013	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	903157715	Returned to Compliance	01-SEP-2013	30-SEP-2013	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	3157609	Returned to Compliance	01-NOV-2008	30-NOV-2008	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3157507	Returned to Compliance	01-MAY-2007	30-JUN-2007	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3157407	Returned to Compliance	01-SEP-2006	30-SEP-2006	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3157306	Returned to Compliance	01-AUG-2006	31-AUG-2006	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	638200	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5996	Returned to Compliance	01-OCT-1995	31-OCT-1995	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	224795	Returned to Compliance	01-FEB-1995	28-FEB-1995	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	315294	Returned to Compliance	01-JUN-1994	30-JUN-1994	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	288994	Returned to Compliance	01-MAY-1994	31-MAY-1994	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	136694	Returned to Compliance	01-MAR-1994	31-MAR-1994	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	3157193	Returned to Compliance	01-MAY-1993	31-MAY-1993	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	6640180	Known	01-JUN-1976	31-MAY-1980	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	6640380	Known	01-JUN-1976	31-MAY-1980	No

1 - 27 of 27

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
8964921	903157747	SOX	State Compliance achieved	23-SEP-2025	State	-
8964920	903157745	SOX	State Compliance achieved	06-JUL-2018	State	-
8964920	903157744	SOX	State Compliance achieved	06-JUL-2018	State	-
8964920	903157743	SOX	State Compliance achieved	06-JUL-2018	State	-
8964919	903157742	SOX	State Compliance achieved	06-JUL-2018	State	-
8964918	903157740	SOX	State Compliance achieved	09-MAY-2017	State	-
8964916	903157732	SOX	State Compliance achieved	09-SEP-2016	State	-
8964916	903157733	SOX	State Compliance achieved	09-SEP-2016	State	-
8964913	903157719	SOX	State Compliance achieved	08-JAN-2014	State	-
8964913	903157720	SOX	State Compliance achieved	08-JAN-2014	State	-
8964912	903157715	SOX	State Compliance achieved	06-DEC-2013	State	-
8964911	903157716	SOX	State Compliance achieved	08-NOV-2013	State	-
8964911	903157717	SOX	State Compliance achieved	08-NOV-2013	State	-
8964911	903157718	SOX	State Compliance achieved	08-NOV-2013	State	-
4	3157609	SOX	State Compliance achieved	08-JAN-2009	State	-
8964908	3157407	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	3157306	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	3157193	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	638200	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	288994	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	224795	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	136694	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	5996	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	3157507	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08
8964908	315294	SOX	State Compliance achieved	01-DEC-2007	State	RTC of old TCR violations - CEM 12/30/08

1 - 25 of 25

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WILLAMETTE RIVER	18205	Yes	Intake	Surface water	Permanent	Active
BOECKMAN WELL	2679	Yes	Well	Ground water	Emergency	Inactive
CANYON CREEK WELL	2678	Yes	Well	Ground water	Emergency	Inactive
NIKE WELL	2677	Yes	Well	Ground water	Emergency	Inactive
GESELLSHAFT WELL	2676	Yes	Well	Ground water	Emergency	Inactive
CHARBONNEAU WELL #2	2675	Yes	Well	Ground water	Emergency	Inactive
CHARBONNEAU WELL #1	2674	Yes	Well	Ground water	Emergency	Inactive
WIEDEMAN WELL	2673	Yes	Well	Ground water	Emergency	Inactive
ELLIGSEN WELL (STAFFORD)	2672	Yes	Well	Ground water	Emergency	Inactive
COMMON HEADER FOR WTP-H	20554	No	Common Headers	-	-	Active
COMMON HEADER FOR WTP-A	19479	No	Common Headers	-	-	Inactive
COMMON HEADER FOR WTP-B	19480	No	Common Headers	-	-	Inactive
COMMON HEADER FOR WTP-F	20376	No	Common Headers	-	-	Inactive
DISTRIBUTION SYSTEM	7441	No	Distribution System/Zone	-	-	Active
EP FOR WILLAMETTE RIVER	18206	No	Sampling Station	-	-	Active
EP FOR GESELLSHAFT WELL	12144	No	Sampling Station	-	-	Inactive
EP FOR ELLIGSEN (STAFFORD) WELL	12864	No	Sampling Station	-	-	Inactive
EP FOR WEIDMAN WELL	12865	No	Sampling Station	-	-	Inactive
EP FOR CHARBONNEAU WELLS	12866	No	Sampling Station	-	-	Inactive
EP FOR NIKE WELL	16725	No	Sampling Station	-	-	Inactive
EP FOR CANYON CREEK	16726	No	Sampling Station	-	-	Inactive
EP FOR BOECKMAN WELL	17135	No	Sampling Station	-	-	Inactive
TP FOR WILLAMETTE RIVER	18207	No	Treatment Plant	-	-	Active
TP FOR CANYON CREEK	1384	No	Treatment Plant	-	-	Inactive
TP FOR ELLIGSEN (STAFFORD) WELL	475	No	Treatment Plant	-	-	Inactive
TP FOR WEIDMAN WELL	476	No	Treatment Plant	-	-	Inactive

1 - 26 of 26

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP FOR WILLAMETTE RIVER	18207	Sedimentation	Particulate removal
TP FOR WILLAMETTE RIVER	18207	Rapid Mix	Particulate removal
TP FOR WILLAMETTE RIVER	18207	Coagulation	Particulate removal
TP FOR WILLAMETTE RIVER	18207	Flocculation	Particulate removal
TP FOR WILLAMETTE RIVER	18207	Filtration, Rapid Sand	Particulate removal
TP FOR WILLAMETTE RIVER	18207	Ozonation, Pre	Disinfection
TP FOR WILLAMETTE RIVER	18207	Innovative	Corrosion control
TP FOR WILLAMETTE RIVER	18207	Hypochlorination, Post	Disinfection

1 - 8 of 8

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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